琼脂培养皿,可以不用照相机,直接用投影的方法、取得照片与底片。不光是琼脂培养皿,凡是透明的玻璃器皿和半透明的实验材料,都可用这种方法制作,既简便、效果又好(见照片)。一、器材: 放大机一只,切纸刀一把,显影盘三只,显影夹三把、四号放大纸,D—72显影剂500毫升,停显剂500毫升,定影剂500毫升。二、方法用放大机作投射光源,调节放大机的升降旋钮,将解大机灯室的位置调得高些,缩 Agar dish, you can not use the camera, direct projection method to obtain photos and negatives. Not only agar plates, but also clear glassware and translucent materials can be made in this way, which is easy and effective (see photos). First, equipment: a magnifying glass, a knife, the development of three discs, developing folder three, four enlarge paper, D-72 Developer 500 ml, stop developer 500 ml, fixing agent 500 ml. Second, the method of using a magnifying glass for projection light source, adjust the magnifier knob, the solution will be larger machine room to adjust the position higher, shrink